Form and reinforcement for concrete casings.



F. A. KGETITZ. FORM A ND RBINPORGEMBNT P03: CONCRETE CASINGS. APPLICATION FILED DBG 21. 1911.

L.. Patent@ @an 1912.

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Qn-MAIL*- Jig? casing.

FREDERICK A.- KOETITZ, OF SAN FRANCISCO, CALIFORNIA.

FORM AND REINFORCEMENT FOR CONCRETE CASINGS.

Speccation of Letters Patent.

ratentedoet'. 29.1912.

Application filed December 21, 1911.. Serial No. 667,096.

rangement whereby the reinforcement is applied and iixedto the inner form so as to be embedded within the concrete, and to bulld up this reinforcement without the use of .temporary forms fromwhich it must afterward be removed and placed in its permanent position.

Referring to the accompanying drawings for a more complete explanation of my invention-l `igure l is a longitudinal view. Fig. 2 1's an enlarged side view of a portion showing the spiral reinforcement. Fig. 3 is a transverse sectionshowing the lugs and therelative position of t-he parts. Figs. 4 and 5 are views showing the sheet metal lining and the lugs or spacers.

Inthe construction of reinforced concrete casings, especially when made of great length, it is difficult and expensive to make and handle the reinforcement separately, to place itover the inner form, or to project the inner form into the reinforcement. It is also difficult to so space the reinforcement as to maintain it at a definite uniform distance from the inner form, and to hold the combined reinforcement and inner form con eentrically in the proper position with relation to the outer form, so as to assure a uni form thickness for the concrete walls of-the In my invention I combine the reinforce- Jnent in a fixed manne1 \vith the inner form,

constructing it permanently around said form, and thus avoiding the use of a temporary form around which such reinforcements are usually constructed, and from which they must be removed and transferred to their final position. This fixed combination, forms practically a trussed structure, and simplifies and greatly strengthens both the reinforcement and the inner form. One helpt!" to strengthen the other during the process of handling them and placing of the concrete.

As shown in the drawing, a is the lower portion of the outer form, and bA the'upper portion. These are conveniently placed in a horizontal position, so that with long ob- ]eots, such as piles. the reinforcements may he properly placed and the concrete after: ward filled in between the inner and the outer form. The lower portion a of thev outer form,`has sufficient opening at the top toa'llow the parts of the reinforcement to be introduced, and 'the upper portion b is fitted over the lower portion after the rein; forcement44 has been applied, and by means of openings or channels in the top, the concrete may be applied.

4 is'tho inner sheet metal lining, which is riveted to lugs, as at 3. These lugs may be of strap form secured to the lining and formed with spacgd tongues 3, which Vextend into the interior;l ofthe form and toward the outer shell. i

l representsl the reinforced rods -which, pass through the tongues extending substantially midway between the inner sheet metal lining or shell fl, and the outer casing a 5 are the outerl extensions or spacers,

which are riveted to the lugs 3 near the bottom. In applying these, the inner casing with tl1e-lugs and extensions fixed to the lower portion are let down into the outer casing a unt-il these extensions rest upon the bottom, thus maintaining the reinforcing rods lin a substantially intermediate positionbetween the inner shell and the outer casing, the spiral reinforcement 2 beingwound aroundthese rods extending from end to end. Side clips and lugs 5 will hold these parts in the relative position. The lugs and extensions surrounding the upper portion of the metal lining or shell serve when the vupper part b of the casingis in place to equally space the rods and reinforcement at this part of the mold, thus preventing the inner easing and reinforcement from rising toward the top, as'it would be liable to do otherwise, and thus vary the thickness of the concrete filling. These parts may be thus placed for any desired end, and are ready for the permanent structure. The concrete is then i filled in through the openings in the upper portion or cap Z) of the outer form, and the reinforcement and spiral winding being firmly held in position, will be embedded in this concrete, and it will be thus evenly distributed around these reinforcements, and when the concrete is set will form a permaii A i EL, I 'lf a. i

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lo hrough said tonguesyund extensions seimeeoe Cured to the inner tongues :and forming; spacers in Contact 'with he outer shell.

In testimony whereof have hereunto so my hand in die presence of two subscribing;

Witnesses.

r l FREDE SHC-K A, Witnesses CHARLES EDELMAN, C. C. Coon'. 

